Calcium-Free Silica Bricks for Glass Furnaces

In the high-temperature production environment of the glass industry. The performance of furnace refractory materials directly determines production efficiency and furnace lifespan. Using calcium-free silica bricks in small and medium-sized glass furnaces extends the furnace overhaul cycle by 60%, saving hundreds of thousands of US dollars in furnace reconstruction costs.

Compared to traditional silica bricks, the biggest advantages of calcium-free silica bricks are:

Extremely strong resistance to alkali corrosion:

In the high-temperature, high-alkali glass melting environment. They are less likely to react with molten glass and alkaline fumes, with an corrosion rate only 1/3.7 that of traditional silica bricks. Effectively preventing brick melting and spalling problems.

High-temperature stability and structural stability:

Calcium-free silica bricks use high-purity silica as the main raw material. This material possesses excellent high-temperature stability and structural stability, with a load softening temperature exceeding 1650℃, making it suitable for long-term high-temperature operation in glass furnaces.

Extremely low coefficient of thermal expansion:

Its coefficient of thermal expansion is extremely low. It does not deform drastically in high-temperature environments above 600℃. And It is not prone to cracking or bulging. After construction, there is no need to leave a large number of expansion joints, which greatly improves the tightness of the kiln wall and the arch.